EP4086190A1 - Pressurized container , sealing element therefor and method of manufacturing the same - Google Patents
Pressurized container , sealing element therefor and method of manufacturing the same Download PDFInfo
- Publication number
- EP4086190A1 EP4086190A1 EP21171886.1A EP21171886A EP4086190A1 EP 4086190 A1 EP4086190 A1 EP 4086190A1 EP 21171886 A EP21171886 A EP 21171886A EP 4086190 A1 EP4086190 A1 EP 4086190A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sealing element
- crimping
- crimp
- pressure accumulator
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/38—Details of the container body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
- F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
- F16J15/024—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
- F16J15/106—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure homogeneous
Definitions
- the invention relates to a pressure accumulator for a liquid dispenser, in particular for cosmetic or pharmaceutical liquids.
- the invention relates in particular to the sealing of this pressure accumulator between a sleeve body and a crimp cover that closes the sleeve body to form a pressure chamber.
- the invention also relates to a sealing element provided for the purpose of sealing, as well as associated methods for producing the pressure accumulator and the sealing element.
- the liquid intended for discharge is stored under pressure in the pressure chamber of the pressure accumulator.
- This includes configurations in which the liquid and compressed gas are arranged together in a common space, ie also bag systems in which the liquid is held in a bag and the compressed gas is held outside of this bag between the bag and the inner wall of the casing body.
- a long-lasting seal between the casing body and the crimp cover is desired. Furthermore, it is advantageous if the connection of the crimp cover and the casing body and the sealing by the sealing element allow a high overpressure in the pressure accumulator without failure due to this overpressure. On the one hand, a high overpressure is valuable in order to maintain an overpressure that is sufficient for the discharge. Furthermore, a high overpressure allows the liquid to be discharged in the form of a particularly fine mist of droplets. This is important, for example, for liquids that are inhaled and are intended to reach the lungs.
- the object of the invention is to provide a pressure accumulator and a sealing element for this that enable a high overpressure and/or long-lasting tightness. It is also the object of the invention to provide corresponding production methods.
- a pressure accumulator for a liquid dispenser is proposed for this purpose.
- This pressure accumulator is preferably used as part of a liquid accumulator, which is next the pressure accumulator also has a discharge head.
- this discharge head can be formed by a depressible actuating pusher, the upper side of which forms a force application surface and on which a discharge opening is provided. If the actuating pusher is depressed, it opens an outlet valve integrated into the pressure accumulator, so that the pressurized liquid from the pressure accumulator can pass through the outlet valve, can flow into the discharge head and is discharged through the discharge opening.
- the pressure accumulator has an enveloping body and a crimp cover which closes this in the area of an opening.
- the cover body is preferably made of metal, in particular aluminum or steel. However, casing bodies made of plastic such as PET can also be used.
- the crimp cover is preferably made of metal, particularly preferably aluminum.
- the crimp cover is intended to close the cover body in the area of an opening provided at its upper end.
- the crimp cover has an outlet opening.
- a valve device is preferably provided on the crimp cover, by means of which the outlet opening can be opened and closed.
- Said opening of the casing body is surrounded by a crimp bead.
- this is a metal end section that is shaped in such a way that it has the shape of a segment of a circle in cross section.
- the crimp cover is intended to close the opening by being crimped with the crimp bead all around.
- the crimping cover preferably has a crimping edge which has a crimping groove, which is directed in the direction of the casing body, and which is pushed onto the crimping bead.
- the crimping of the crimping cover on the crimping bead can be done in two ways, which can, however, also be combined.
- One possibility is that a part of the crimping edge on the outside of said crimping groove is pressed inwards all the way around below the crimping bead.
- a second possibility, which is particularly relevant in the context of the present invention, is that a part of the crimping edge is provided on the inside of the crimping groove, which is pressed outwards circumferentially below the crimping bead.
- a sealing element is arranged in the receiving space formed by the inside of the crimping edge and the outside of the crimping bead.
- This sealing element consists of an elastically deformable and compressible material such as an elastomer. After the pressure accumulator has been installed, the sealing element rests in a sealing manner between an underside of the crimping edge and an upper side of the crimping bead.
- this sealing element reliably closes the mentioned gap in the long term and also in the case of a high overpressure in the pressure accumulator, it is provided that the sealing element is located at least for the most part in an outer area of the receiving space.
- the receiving space which extends from an inside approach area of crimp bead and crimp cover to an outside approach area of crimp bead and crimp cover, has an inner area that is on the inside and widens outwards and an outer area that is on the outside and an outer area that is tapered to the outside.
- the area within the receiving space in which the crimp cover is at a maximum distance from the crimp bead forms the boundary line between the inner area and the outer area.
- the sealing element is arranged for the most part in the outer area of the receiving space. This means that more than 50% of the mass of the sealing element is in the outside area, preferably more than 60%, particularly preferably more than 70%.
- the arrangement of the sealing element on the outside causes the overpressure in the accumulator to tend to push the sealing element further into the outside. This results in a sealing effect that is reinforced by overpressure.
- the sealing lines or sealing surfaces, along which the sealing element bears circumferentially on the inside of the crimping edge or circumferentially on an outside of the crimping bead are located in the outer area of the receiving space.
- the pressure acting on the seal between these sealing lines or sealing surfaces from the inner area of the receiving space thereby presses the sealing element particularly effectively in the direction of the approach area delimiting the receiving space on the outside and strengthens the sealing effect.
- the inside widening of the crimp ensures that the outside Parts of the crimping edge and in particular in the area of the crimping groove, which delimits the receiving space, are pulled inwards and thus tend to pull the sealing element into the inner area of the receiving space. If the sealing element is arranged in the same way on the outside and inside before the crimping, it can be pulled into the inside area by the crimping process.
- the pressure accumulator is provided to hold a liquid to be discharged. It is therefore preferably filled with a pharmaceutical liquid such as an inhalable liquid or with a cosmetic liquid such as a deodorant. However, other applications are also included.
- a pressure accumulator according to the invention can also be used to hold and dispense food or technical liquids such as paints or oils.
- the liquid can be arranged together with a compressed gas directly in the interior space defined by the cover body.
- a bag can be arranged inside the case body, which bag receives the liquid and communicates with the outlet opening, while the compressed gas is provided between an outside of the bag and an inside of the case body.
- the sealing element is preferably of the type described below.
- Such a sealing element according to the invention is made from an elastically deformable material, in particular a plastic.
- the sealing element is designed as an annular sealing element, which defines a free annular interior with an inner contour and whose outer surface facing away from the annular inner space forms an outer contour of the sealing element.
- the cross section through the sealing element has an inner inner part and an outer outer part.
- the inner part points in the direction of the ring interior.
- the outer part faces outwards in the opposite direction.
- a boundary line between the inner part and the outer part within the meaning of this invention is formed by an average diameter between a minimum inner diameter on the inner contour and a maximum outer diameter on the outer contour.
- an imaginary cylindrical interface with a diameter of 22 mm separates the inner part and the outer part in the sense of this invention.
- a sealing element according to the invention has a design that promotes the sealing lines or sealing surfaces, along which the sealing element rests against the crimp cover and the crimping bead in the receiving space of a pressure accumulator, being located in the outer area of the receiving space.
- the outer part has a greater maximum thickness than the inner part.
- the outer part has a higher mean density and/or a higher mean modulus of elasticity than the inner part.
- in a third design option it is provided that in the inner part circumferentially arranged inwardly facing and spaced holding sections are provided, in the area of which an inner diameter is smaller than in the area of free areas provided between the holding sections.
- a thicker outer part is combined with a thinner inner part. This means that primarily the thicker outer part comes into contact with the crimp cover and the crimp bead, so that the mentioned sealing lines or sealing surfaces can be found in the outer area and therefore the above-described reinforcing sealing effect occurs under overpressure.
- the shape of such a sealing element according to the first design option mentioned can, for example, be such that the sealing element has a conical shape and/or a stepped shape on an underside and/or on an upper side, which leads to a cross section that widens outward.
- a design is also possible in which the outer part has a toroidal section or a predominant part of the toroidal section, while the inner area has a retaining ring connected to the toroidal section, the thickness of which is less than the thickness of the toroidal section.
- the retaining ring is subordinate to the sealing effect. Its function consists in particular in simplifying the handling of the sealing element during assembly by frictionally engaging an inner annular surface of the crimp cover when the crimp cover is connected to the casing body.
- the outer section preferably has an outer diameter, by means of which it also rests frictionally on an inwardly pointing ring surface of the crimp cover.
- the outer part has a higher average density and/or a higher average modulus of elasticity than the inner part.
- the inner part has a greater tendency to compress and can therefore be deflected or compressed more easily by the liquid pressure, so that the sealing lines or sealing surfaces mentioned are in turn primarily set in the outer area of the receiving space.
- the variations with regard to the density or the modulus of elasticity can be caused by the respective structure in the case of a uniform material.
- a partially foam-like structure of the inner part can reduce the density or the modulus of elasticity there.
- the sealing element is made of at least two materials, with a material predominantly forming the interior preferably having a lower modulus of elasticity and/or a lower density than the material predominantly forming the exterior.
- Multi-component injection molding is preferably used to produce such a sealing element from at least two materials, so that the two materials are bonded to one another.
- the third design option provides for tongue-like holding sections to be provided on the sealing element, which hold sections point inwards and which are therefore at least predominantly attributable to the inner part of the sealing element. Preferably, between three and eight such inwardly facing retaining portions are provided. These holding sections can serve the purpose of frictionally engaging the said inner annular surface for the purpose of simplified assembly.
- the pressure prevailing in the pressure accumulator can escape to the outside in the area of the holding areas and then acts in the desired manner primarily on the outer part, which is preferably located in the outer area of the receiving space.
- the assembly of a pressure accumulator according to the invention is carried out according to the invention as follows: Starting from a sleeve body, at the upper end of which there is an opening which is surrounded by a crimping bead, a crimping cover which has a circumferential crimping groove open in the direction of the crimping bead in the area of a crimping edge, and a sealing element of the type described, the sealing element is first inserted into the crimping groove. This is preferably done in such a way that the sealing element is frictionally held on an outside or an inside surface of the crimping groove.
- the sealing element can also be matched to the crimping groove in such a way that its outer part is held in a non-positive manner on the inward-facing surface of the crimping groove and its inner part, in particular the holding sections described above, is held in a friction-locked manner on the outward-facing surface of the crimping groove.
- the crimp cover together with the sealing element held therein, is then placed on the crimp bead of the casing body.
- the sealing element comes into contact with the crimping bead and is compressed between the crimping bead and the crimping groove.
- the crimping process then takes place by deforming the crimp cover, which can be done on the inside by an outwardly directed widening or on the outside by an inwardly directed constricting deformation in the manner already described above.
- the invention also relates to a method for producing a sealing element, namely the sealing element described above, in which it is provided that tongue-like holding sections pointing inwards are provided.
- a method is proposed in which a hose body is first produced from an elastic material. On an inner side, this hose body has holding strands extending in a longitudinal direction, in the area of which an inner diameter of the hose body is smaller than in the area of grooves provided between the holding strands. Between three and eight such holding strands and, accordingly, just as many grooves are preferably provided. The tubular body is then subsequently cut transversely to its longitudinal direction. This creates separate disks. These form the sealing elements or are further processed into sealing elements by means of further processing steps.
- the method described is inexpensive and particularly well suited for mass production.
- the Figures 1A and 1B show a liquid dispenser 100 according to the invention and its pressure accumulator 10.
- the pressure accumulator 10 has a casing body 20 which has an opening 22 at its upper end.
- the cover body is preferably made of metal, but can also be made of a sufficiently pressure-resistant plastic. In the area of the opening 22 the wall of the casing body is bent over to form a crimp bead 24 .
- a metallic crimping cover 30 is provided, which has a crimping edge 32 which is intended to be crimped with the crimping bead 24 of the casing body 20 .
- a sealing element 50 is inserted between the crimping bead 24 and the crimping edge 32, which isolates the interior of the pressure accumulator 10 from the environment and which for this purpose must be able to ensure sealing despite the pressure prevailing in the pressure accumulator 10.
- the liquid dispenser 100 also has a discharge head 90, which in the present example is of very simple design and comprises only one actuating button 90, which is placed on a valve socket 37 of a valve device 38, so that when the actuating button 90 is depressed, the valve device 38 is opened and liquid can flow out through the discharge opening 92.
- FIGS. 2A to 2C show the crimping process for closing the accumulator 10, as is currently common.
- a sealing element 50 in the form of a flat sealing ring is used here as an example. This is positioned in an area between the top of the crimping bead 24 and the bottom of the crimping edge 32, in particular in the interior of a crimping groove 34 formed by the crimping edge 32 and open at the bottom Figure 2A are the elements of the crimp cover 30 and the shell body 20 in a starting position. Based on this, the crimp cover 30 is pressed down. In the in the Figure 2B As can be seen, the sealing element 50 is deformed here. Starting from the already compressed state of the Figure 2B the actual crimping process follows.
- a crimping bead 39 is introduced into the wall of the crimping edge 32 from the inside.
- This crimping bead 39 causes a positive fit with the underside of the crimping bead 24.
- This step of producing the crimping bead 39 causes the wall in the area of the crimping groove 34 to be pulled somewhat inwards and the sealing element 50 to be pulled along. The effect of this is that in the assembled and crimped state Figure 2C the sealing member 50 tends to be located in an interior of the receiving space 40 defined by the crimping bead 24 and the crimping edge 32.
- This position of the sealing element is disadvantageous. If there is a high excess pressure in the pressure accumulator 10, it can happen that the pressure pushes the sealing element 50 further outwards, so that it loses contact with the crimping bead 24 or the crimping edge 32 in places. The tightness of the pressure accumulator 10 is then no longer given.
- FIGS. 3A to 3C show a first inventive design to counteract this problem.
- a sealing element 50 is provided, which is primarily arranged in an outer area of the receiving space 40 .
- this sealing element is again shown separately.
- the sealing element 50 which in this case has a toroidal section 54A and an internal retaining ring 52C before compression, is in the state of compression when it is compressed Figure 3B above all in an outer area of the receiving space 40 on the crimp cover 30 and on the crimp bead 24 . Even the slight retraction of the sealing element 50 in the course of the incorporation of the crimp bead 39 no longer leads to a displacement of the sealing element 50 inwards, through which it would be mainly pulled in the inner region.
- the receiving space 40 is divided into two areas.
- An inner inner area 42 extends up to the boundary line 43, which is defined by the point at which the crimping bead 24 and the inside of the crimping groove 34 are at a maximum distance from one another.
- the area outside of this boundary line 43 represents the outside area Figures 4A and 4B make clear, the sealing element with its originally toroidal section 54A is arranged predominantly or in the present case even completely in the outer area 44 of the receiving space 40 .
- the Figures 4C and 4D show the sealing element 50 used in this case in a separate representation and prior to deformation during assembly. From this it can be seen that the thickness of the sealing member 50 is greater on the outside.
- the sealing element is conceptually subdivided into an inner part and an outer part, which are delimited by a dividing line 4 from one another.
- the inner part is that inner part between a minimum inner diameter of the sealing element 50 and the boundary line 4.
- the outer part of the sealing element 50 is that between a maximum outer diameter and that boundary line 4.
- the boundary line 4 is defined by a mean diameter 2 formed by the mean value of the minimum inside diameter 1 and the maximum outside diameter 3 .
- the outer portion 54 is formed with the significantly greater thickness due to the toroidal portion 54A.
- an O-ring is used here as the sealing element 50, ie a sealing element which as such does not have to be designed specifically for use in a pressure accumulator according to the invention. Due to the fact that this O-ring has an outer diameter that corresponds to the inner diameter on an outer wall of the crimping groove 34 corresponds, it can first be inserted into the crimping groove 34 to form a frictional holding force, in order to then be compressed, as in Figure 5B is shown in order to remain in the outer area 44 of the receiving space 40 when the crimp beads 39 are introduced.
- the sealing elements 50 of Figures 7 and 8 are characterized in that their inner part 52 is mainly formed by tongue-like inwardly pointing holding sections 52A. These holding sections 52A facilitate assembly by means of a non-positive hold on the crimp cover 30, but are of little or no importance for the seal.
- the sealing takes place at an annular outer part 54 of the sealing element 50 .
- the design of Figures 7 and 8 differ from one another only in the number of holding sections 52A provided in each case.
- the cross section of the sealing element 50 widens outwards in the direction of the outer part 54 .
- the top and the bottom are provided with conical shapes 50A.
- one-sided or two-sided stepped shapes 50B are provided in order to widen the sealing element 50 in the area of its outer part.
- FIG. 14 shows the sealing element, which is already in the Figures 3A to 4D as shown, having an outboard toroidal portion 54A and an inboard retaining ring 52C.
- the sealing elements 50 consist of two different materials 51A, 51B.
- the material 51A is used in particular in the inner part 52 of the sealing element 50 .
- the harder material 51B which is less compressible, is used on the outer part 54 of the sealing element 50 .
- the 17 shows how sealing elements of in 7 shown type can be easily produced.
- a hose body 150 is created, during the production of which an inner contour deviating from the circular shape is produced.
- This inner contour alternately has retaining strands 152A and grooves 152B.
- the sealing elements 50 are produced by cuts transverse to the main extension direction of the hose body 150 , with the retaining strands 152A forming the described retaining sections 52A of the sealing elements 50 .
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- General Engineering & Computer Science (AREA)
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Abstract
Bekannt sind Druckspeicher (10) für Flüssigkeitsspender, insbesondere für kosmetisch oder pharmazeutische Flüssigkeiten. Ein solcher Druckspeicher (10) weist einen Hüllenkörper (20) auf, an dessen oberen Ende eine Öffnung (22) vorgesehen ist, die von einem Crimpwulst (24) umgeben ist. Der Druckspeicher weist weiterhin einen Crimpdeckel (30) auf, der von einer Auslassöffnung (36) durchdrungen ist und der mittels eines Crimprandes (32) mit dem die Öffnung (22) des Hüllenkörpers (20) umgebenden Crimpwulst (24) umlaufend vercrimpt ist. Zwischen einer Innenseite des Crimprandes (32) und einer Außenseite des Crimpwulstes (24) ist ein umlaufender Aufnahmeraum (40) vorgesehen, innerhalb dessen ein Dichtelement (50) vorgesehen ist.Es wird vorgeschlagen, dass sich das Dichtelement zum überwiegenden Teil im Außenbereich (44) des Aufnahmeraums (40) befindet. Dieser Außenbereich (44) ist ein äußerer Bereich des Aufnahmeraums (40), der sich nach außen hin verjüngt.Pressure accumulators (10) for liquid dispensers, in particular for cosmetic or pharmaceutical liquids, are known. Such a pressure accumulator (10) has a sleeve body (20) at the upper end of which there is an opening (22) which is surrounded by a crimp bead (24). The accumulator also has a crimp cover (30) through which an outlet opening (36) penetrates and which is crimped by means of a crimp edge (32) to the crimp bead (24) surrounding the opening (22) of the casing body (20). Between an inner side of the crimping edge (32) and an outer side of the crimping bead (24), there is a circumferential receiving space (40), within which a sealing element (50) is provided. It is proposed that the sealing element be located predominantly in the outer area (44 ) of the receiving space (40) is located. This outer area (44) is an outer area of the receiving space (40) which tapers towards the outside.
Description
Die Erfindung betrifft einen Druckspeicher für einen Flüssigkeitsspender, insbesondere für kosmetisch oder pharmazeutische Flüssigkeiten. Die Erfindung betrifft dabei insbesondere die Abdichtung dieses Druckspeichers zwischen einem Hüllenkörper und einem den Hüllenkörper unter Bildung eines Druckraums verschließenden Crimpdeckel. In diesem Kontext betrifft die Erfindung weiterhin ein zum Zwecke der Abdichtung vorgesehenes Dichtelement sowie hiermit im Zusammenhang stehende Verfahren zur Herstellung des Druckspeichers und des Dichtelements.The invention relates to a pressure accumulator for a liquid dispenser, in particular for cosmetic or pharmaceutical liquids. The invention relates in particular to the sealing of this pressure accumulator between a sleeve body and a crimp cover that closes the sleeve body to form a pressure chamber. In this context, the invention also relates to a sealing element provided for the purpose of sealing, as well as associated methods for producing the pressure accumulator and the sealing element.
Bei gattungsgemäßen Druckspeichern ist vorgesehen, dass die zum Austrag vorgesehene Flüssigkeit im Druckraum des Druckspeichers unter Druck gelagert wird. Dies umfasst sowohl Gestaltungen, bei denen die Flüssigkeit und komprimiertes Gas zusammen in einem gemeinsamen Raum angeordnet sind, also auch Beutelsysteme, bei denen die Flüssigkeit in einem Beutel vorgehalten wird und das komprimierte Gas außerhalb dieses Beutels zwischen Beutel und Innenwandung des Hüllenkörpers vorgehalten wird.In the case of pressure accumulators of this type, it is provided that the liquid intended for discharge is stored under pressure in the pressure chamber of the pressure accumulator. This includes configurations in which the liquid and compressed gas are arranged together in a common space, ie also bag systems in which the liquid is held in a bag and the compressed gas is held outside of this bag between the bag and the inner wall of the casing body.
Damit ein Austrag der Flüssigkeit langfristig möglich bleibt, ist eine lang wirksame Abdichtung zwischen dem Hüllenkörper und dem Crimpdeckel gewünscht. Weiterhin ist es vorteilhaft, wenn die Verbindung des Crimpdeckels und des Hüllenkörpers und die Abdichtung durch das Dichtelement einen hohen Überdruck im Druckspeicher gestatten, ohne aufgrund dieses Überdrucks zu versagen. Ein hoher Überdruck ist zum einen wertvoll, um ausreichend lange einen für den Austrag ausreichenden Überdruck aufrecht zu erhalten. Weiterhin gestattet es ein hoher Überdruck, die Flüssigkeit in Form eines besonders feinen Tröpfchennebels auszutragen. Dies ist beispielsweise bei Flüssigkeiten wichtig, die inhaliert werden und bis in die Lunge gelangen sollen.To ensure that the liquid can be discharged over the long term, a long-lasting seal between the casing body and the crimp cover is desired. Furthermore, it is advantageous if the connection of the crimp cover and the casing body and the sealing by the sealing element allow a high overpressure in the pressure accumulator without failure due to this overpressure. On the one hand, a high overpressure is valuable in order to maintain an overpressure that is sufficient for the discharge. Furthermore, a high overpressure allows the liquid to be discharged in the form of a particularly fine mist of droplets. This is important, for example, for liquids that are inhaled and are intended to reach the lungs.
Aufgabe der Erfindung ist es, einen Druckspeicher sowie ein Dichtelement hierfür zur Verfügung zu stellen, die einen hohen Überdruck und/oder lang anhaltende Dichtigkeit ermöglichen. Aufgabe der Erfindung ist es weiterhin, korrespondierende Herstellungsverfahren zur Verfügung zu stellen.The object of the invention is to provide a pressure accumulator and a sealing element for this that enable a high overpressure and/or long-lasting tightness. It is also the object of the invention to provide corresponding production methods.
Erfindungsgemäß wird hierfür ein Druckspeicher für einen Flüssigkeitsspender vorgeschlagen. Dieser Druckspeicher findet vorzugweise Anwendung als Teil eines Flüssigkeitsspeichers, der neben dem Druckspeicher auch über einen Austragkopf verfügt. Dieser Austragkopf kann im einfachsten Falle durch einen niederdrückbaren Betätigungsdrücker gebildet werden, dessen Oberseite eine Kraftbeaufschlagungsfläche bildet und an welchem eine Austragöffnung vorgesehen ist. Wird der Betätigungsdrücker niedergedrückt, so öffnet er ein in den Druckspeicher integriertes Auslassventil auf, so dass die druckbeaufschlagte Flüssigkeit aus dem Druckspeicher das Auslassventil passieren kann, in den Austragkopf einströmen kann und von hierdurch die Austragöffnung ausgetragen wird.According to the invention, a pressure accumulator for a liquid dispenser is proposed for this purpose. This pressure accumulator is preferably used as part of a liquid accumulator, which is next the pressure accumulator also has a discharge head. In the simplest case, this discharge head can be formed by a depressible actuating pusher, the upper side of which forms a force application surface and on which a discharge opening is provided. If the actuating pusher is depressed, it opens an outlet valve integrated into the pressure accumulator, so that the pressurized liquid from the pressure accumulator can pass through the outlet valve, can flow into the discharge head and is discharged through the discharge opening.
Der Druckspeicher weist einen Hüllenkörper und einen diesen im Bereich einer Öffnung verschließenden Crimpdeckel auf. Der Hüllenkörper ist vorzugsweise aus Metall hergestellt, insbesondere aus Aluminium oder Stahl. Es sind jedoch auch Hüllenkörper aus Kunststoff wie PET verwendbar. Der Crimpdeckel ist vorzugsweise aus Metall hergestellt, insbesondere vorzugsweise aus Aluminium.The pressure accumulator has an enveloping body and a crimp cover which closes this in the area of an opening. The cover body is preferably made of metal, in particular aluminum or steel. However, casing bodies made of plastic such as PET can also be used. The crimp cover is preferably made of metal, particularly preferably aluminum.
Der Crimpdeckel ist dafür vorgesehen, den Hüllenkörper im Bereich einer Öffnung zu verschließen, die an dessen oberen Ende vorgesehen ist. Der Crimpdeckel weist eine Auslassöffnung auf. Vorzugsweise ist am Crimpdeckel eine Ventileinrichtung vorgesehen, mittels derer die Auslassöffnung geöffnet und geschlossen werden kann.The crimp cover is intended to close the cover body in the area of an opening provided at its upper end. The crimp cover has an outlet opening. A valve device is preferably provided on the crimp cover, by means of which the outlet opening can be opened and closed.
Die genannte Öffnung des Hüllenkörpers ist von einem Crimpwulst umgeben. Insbesondere handelt es sich hier um einen metallischen Endabschnitt, der derart umgeformt ist, dass er im Querschnitt eine Kreissegmentform aufweist.Said opening of the casing body is surrounded by a crimp bead. In particular, this is a metal end section that is shaped in such a way that it has the shape of a segment of a circle in cross section.
Der Crimpdeckel ist dafür vorgesehen, die Öffnung zu verschließen, indem er umlaufend mit dem Crimpwulst vercrimpt wird. Vorzugsweise weist der Crimpdeckel hierfür einen Crimprand auf, der in Richtung des Hüllenkörpers gerichtet eine Crimpnut aufweist, die auf den Crimpwulst aufgeschoben wird.The crimp cover is intended to close the opening by being crimped with the crimp bead all around. For this purpose, the crimping cover preferably has a crimping edge which has a crimping groove, which is directed in the direction of the casing body, and which is pushed onto the crimping bead.
Das Vercrimpen des Crimpdeckels am Crimpwulst kann insbesondere auf zwei Arten erfolgen, die jedoch auch kombinierbar sind. Eine Möglichkeit besteht darin, dass ein Teil des Crimprandes an der Außenseite der genannten Crimpnut unterhalb des Crimpwulstes umlaufend nach innen gedrückt wird. Eine zweite Möglichkeit, die im Kontext der vorliegenden Erfindung besonders relevant ist, besteht darin, dass ein Teil des Crimprandes der innenseitig der Crimpnut vorgesehen ist, der unterhalb des Crimpwulstes umlaufend nach außen gedrückt wird.The crimping of the crimping cover on the crimping bead can be done in two ways, which can, however, also be combined. One possibility is that a part of the crimping edge on the outside of said crimping groove is pressed inwards all the way around below the crimping bead. A second possibility, which is particularly relevant in the context of the present invention, is that a part of the crimping edge is provided on the inside of the crimping groove, which is pressed outwards circumferentially below the crimping bead.
Um den zwischen der Unterseite des Crimprandes bzw. der Innenseite der dortigen Crimpnut einerseits und der Oberseite des Crimpwulstes verbleibenden Spalt dicht zu verschließen, ist in dem hier durch die Innenseite des Crimprandes und die Außenseite des Crimpwulstes gebildeten Aufnahmeraum ein Dichtelement angeordnet. Dieses Dichtelement besteht aus einem elastisch verformbaren und komprimierbaren Material wie einem Elastomer. Das Dichtelement liegt nach der Montage des Druckspeichers zwischen an einer Unterseite des Crimprandes und an einer Oberseite des Crimpwulstes dichtend an.In order to tightly close the gap remaining between the underside of the crimp edge or the inside of the crimp groove there on the one hand and the top of the crimp bead, in the here A sealing element is arranged in the receiving space formed by the inside of the crimping edge and the outside of the crimping bead. This sealing element consists of an elastically deformable and compressible material such as an elastomer. After the pressure accumulator has been installed, the sealing element rests in a sealing manner between an underside of the crimping edge and an upper side of the crimping bead.
Damit dieses Dichtelement den genannten Spalt langfristig und auch bei hohem Überdruck im Druckspeicher sicher verschließt, ist vorgesehen, dass das Dichtelement sich zumindest zum überwiegenden Teil in einem Außenbereich des Aufnahmeraums befindet.So that this sealing element reliably closes the mentioned gap in the long term and also in the case of a high overpressure in the pressure accumulator, it is provided that the sealing element is located at least for the most part in an outer area of the receiving space.
Der Aufnahmeraum, der sich von einem innenseitigen Annäherungsbereich von Crimpwulst und Crimpdeckel bis zu einem außenseitigen Annäherungsbereich von Crimpwulst und Crimpdeckel erstreckt, weist einen innenliegenden und sich nach außen aufweitenden Innenbereich und einen außenliegenden und einen sich nach außen verjüngenden Außenbereich auf. Der Bereich innerhalb des Aufnahmeraums, in welchem der Crimpdeckel maximal vom Crimpwulst beabstandet ist, bildet die Grenzlinie zwischen dem Innenbereich und dem Außenbereich.The receiving space, which extends from an inside approach area of crimp bead and crimp cover to an outside approach area of crimp bead and crimp cover, has an inner area that is on the inside and widens outwards and an outer area that is on the outside and an outer area that is tapered to the outside. The area within the receiving space in which the crimp cover is at a maximum distance from the crimp bead forms the boundary line between the inner area and the outer area.
Das Dichtelement ist erfindungsgemäß zum überwiegenden Teil im Außenbereich des Aufnahmeraums angeordnet. Hierunter ist zu verstehen, dass mehr als 50% der Masse des Dichtelements sich im Außenbereich befinden, vorzugsweise mehr als 60%, insbesondere vorzugsweise mehr als 70%.According to the invention, the sealing element is arranged for the most part in the outer area of the receiving space. This means that more than 50% of the mass of the sealing element is in the outside area, preferably more than 60%, particularly preferably more than 70%.
Die Anordnung des Dichtelements im Außenbereich bewirkt, dass der Überdruck im Druckspeicher dazu neigt, das Dichtelement weiter in den Außenbereich zu drücken. Es stellt sich somit eine durch Überdruck verstärkende Dichtwirkung ein.The arrangement of the sealing element on the outside causes the overpressure in the accumulator to tend to push the sealing element further into the outside. This results in a sealing effect that is reinforced by overpressure.
Insbesondere ist es bevorzugt, wenn die Dichtlinien oder Dichtflächen, entlang derer das Dichtelement umlaufend an der Innenseite des Crimprandes bzw. umlaufend an einer Außenseite des Crimpwulstes anliegt, sich im Außenbereich des Aufnahmeraums befindet. Der zwischen diesen Dichtlinien oder Dichtflächen vom Innenbereich des Aufnahmeraums aus auf die Dichtung wirkende Druck drückt hierdurch das Dichtelement besonders wirksam in Richtung des den Aufnahmeraum außen begrenzenden Annäherungsbereich und verstärkt die Dichtwirkung.In particular, it is preferred if the sealing lines or sealing surfaces, along which the sealing element bears circumferentially on the inside of the crimping edge or circumferentially on an outside of the crimping bead, are located in the outer area of the receiving space. The pressure acting on the seal between these sealing lines or sealing surfaces from the inner area of the receiving space thereby presses the sealing element particularly effectively in the direction of the approach area delimiting the receiving space on the outside and strengthens the sealing effect.
Von besonderer Bedeutung ist dies, wenn der Formschluss zwischen dem Crimpdeckel und dem Crimpwulst hergestellt ist, indem der Crimprand von innen unterhalb des Crimpwulstes nach außen gedrückt ist. Bei dieser Art des Vercrimpens sorgt die innenseitige Crimpaufweitung dafür, dass äußere Teile des Crimprandes und insbesondere im Bereich der Crimpnut, die den Aufnahmeraum begrenzt, nach innen gezogen werden und somit das Dichtelement tendenziell in den Innenbereich des Aufnahmeraums ziehen. Ist das Dichtelement vor dem Crimpen gleichermaßen im Außenbereich und im Innenbereich angeordnet, so kann es durch den Crimpvorgang in den Innenbereich gezogen werden. Dies würde die Dichtwirkung verschlechtern, da der Druck das überwiegend im Innenbereich angeordnete Dichtelement und die dortigen Dichtlinien bzw. Dichtflächen in Richtung des Außenbereichs und somit in einen weiter aufgeweiteten Teil des Innenbereichs drücken würde. Hierbei wäre die Gefahr eines Verlustes der Dichtigkeit hoch. Daher ist es insbesondere bei dem beschriebenen Crimpverfahren mit innenseitigem Crimpen von Vorteil, wenn das Dichtelement weit im Außenbereich positioniert ist.This is of particular importance when the form fit between the crimp cover and the crimp bead is produced by the crimp edge being pressed outwards from the inside below the crimp bead. With this type of crimping, the inside widening of the crimp ensures that the outside Parts of the crimping edge and in particular in the area of the crimping groove, which delimits the receiving space, are pulled inwards and thus tend to pull the sealing element into the inner area of the receiving space. If the sealing element is arranged in the same way on the outside and inside before the crimping, it can be pulled into the inside area by the crimping process. This would worsen the sealing effect, since the pressure would press the sealing element, which is predominantly arranged in the inner area, and the sealing lines or sealing surfaces there in the direction of the outer area and thus into a more widened part of the inner area. In this case, the risk of loss of tightness would be high. It is therefore advantageous, particularly in the case of the described crimping method with crimping on the inside, if the sealing element is positioned far in the outside area.
Der Druckspeicher ist zur Aufnahme einer auszutragenden Flüssigkeit vorgesehen. Er ist daher vorzugsweise mit einer pharmazeutischen Flüssigkeit wie bspw. einer Inhalationsflüssigkeit oder mit einer kosmetischen Flüssigkeit wie einem Deodorant befüllt. Es sind jedoch auch andere Anwendungen umfasst. So kann insbesondere ein erfindungsgemäßer Druckspeicher auch zur Aufnahme und Abgabe von Lebensmitteln oder technischen Flüssigkeiten wie Lacken oder Ölen Verwendung finden.The pressure accumulator is provided to hold a liquid to be discharged. It is therefore preferably filled with a pharmaceutical liquid such as an inhalable liquid or with a cosmetic liquid such as a deodorant. However, other applications are also included. In particular, a pressure accumulator according to the invention can also be used to hold and dispense food or technical liquids such as paints or oils.
Die Flüssigkeit kann zusammen mit einem komprimierten Gas unmittelbar in dem durch den Hüllenkörper definierten Innenraum angeordnet sein. Alternativ kann innerhalb des Hüllenkörpers ein Beutel angeordnet sein, der die Flüssigkeit aufnimmt und mit dem Auslassöffnung in Verbindung steht, während das komprimierte Gas zwischen einer Außenseite des Beutels und einer Innenseite des Hüllenkörpers vorgesehen ist.The liquid can be arranged together with a compressed gas directly in the interior space defined by the cover body. Alternatively, a bag can be arranged inside the case body, which bag receives the liquid and communicates with the outlet opening, while the compressed gas is provided between an outside of the bag and an inside of the case body.
Vorzugsweise ist das Dichtelement von nachfolgend beschriebener Art.The sealing element is preferably of the type described below.
Ein solches erfindungsgemäßes Dichtelement ist aus einem elastisch verformbaren Material, insbesondere einem Kunststoff gefertigt. Das Dichtelement ist als ringförmiges Dichtelement ausgebildet, welches mit einer Innenkontur einen freien Ringinnenraum definiert und dessen vom Ringinnenraum weg weisende Außenfläche eine Außenkontur des Dichtelements bildet.Such a sealing element according to the invention is made from an elastically deformable material, in particular a plastic. The sealing element is designed as an annular sealing element, which defines a free annular interior with an inner contour and whose outer surface facing away from the annular inner space forms an outer contour of the sealing element.
Der Querschnitt durch das Dichtelement weist einen innenliegenden Innenteil und einen außenliegenden Außenteil auf. Der Innenteil weist in Richtung des Ringinnenraums. Der Außenteil weist dem entgegengesetzt nach außen. Eine Grenzlinie zwischen dem Innenteil und dem Außenteil im Sinne dieser Erfindung wird durch einen mittleren Durchmesser zwischen einem minimalen Innendurchmesser an der Innenkontur und einem maximalen Au ßendurchmesser an der Außenkonturgebildet.The cross section through the sealing element has an inner inner part and an outer outer part. The inner part points in the direction of the ring interior. The outer part faces outwards in the opposite direction. A boundary line between the inner part and the outer part within the meaning of this invention is formed by an average diameter between a minimum inner diameter on the inner contour and a maximum outer diameter on the outer contour.
Beträgt der minimale Innendurchmesser an der Innenkontur bspw. 20 mm und der maximale Außendurchmesser an der Außenkontur bspw. 24 mm, so trennt eine gedachte zylindrische Grenzfläche mit einem Durchmesser von 22 mm den Innenteil und den Außenteil im Sinne dieser Erfindung.If the minimum inner diameter on the inner contour is 20 mm, for example, and the maximum outer diameter on the outer contour is 24 mm, for example, then an imaginary cylindrical interface with a diameter of 22 mm separates the inner part and the outer part in the sense of this invention.
Ein erfindungsgemäßes Dichtelement weist eine Gestaltung auf, die begünstigt, dass die Dichtlinien bzw. Dichtflächen, entlang derer das Dichtelement im Aufnahmeraum eines Druckspeichers am Crimpdeckel und dem Crimpwulst anliegt, sich im Außenbereich des Aufnahmeraums befinden.A sealing element according to the invention has a design that promotes the sealing lines or sealing surfaces, along which the sealing element rests against the crimp cover and the crimping bead in the receiving space of a pressure accumulator, being located in the outer area of the receiving space.
Dabei sind verschiedene Gestaltungsmöglichkeiten gegeben, die auch in Kombination vorgesehen sein können.Various design options are given, which can also be provided in combination.
Bei einer ersten Gestaltungsmöglichkeit ist vorgesehen, dass der Außenteil eine größere maximale Dicke als der Innenteil aufweist. Bei einerzweiten Gestaltungsmöglichkeit ist vorgesehen, dass der Außenteil eine höhere mittlere Dichte und/oder ein höheres mittleres E-Modul als der Innenteil aufweist. Bei einer dritten Gestaltungsmöglichkeit ist vorgesehen, dass im Innenteil umfänglich angeordnete nach innen weisende und voneinander beabstandete Halteabschnitte vorgesehen sind, im Bereich derer ein Innendurchmesser geringer ist als im Bereich von zwischen den Halteabschnitten vorgesehenen Freibereiche.In a first design option, it is provided that the outer part has a greater maximum thickness than the inner part. In a second design option, it is provided that the outer part has a higher mean density and/or a higher mean modulus of elasticity than the inner part. In a third design option, it is provided that in the inner part circumferentially arranged inwardly facing and spaced holding sections are provided, in the area of which an inner diameter is smaller than in the area of free areas provided between the holding sections.
Bei der ersten Gestaltungsmöglichkeit ist ein dickerer Außenteil mit einem dünneren Innenteil kombiniert. Dies führt dazu, dass sich primär der dickere Außenteil an den Crimpdeckel und an den Crimpwulst anlegt, so dass die genannten Dichtlinien bzw. Dichtflächen im Außenbereich vorzufinden sind und sich daher die oben beschriebene verstärkende Dichtwirkung unter Überdruck einstellt.In the first design option, a thicker outer part is combined with a thinner inner part. This means that primarily the thicker outer part comes into contact with the crimp cover and the crimp bead, so that the mentioned sealing lines or sealing surfaces can be found in the outer area and therefore the above-described reinforcing sealing effect occurs under overpressure.
Die Formgebung eines solchen Dichtelements gemäß der ersten genannten Gestaltungsmöglichkeit kann beispielsweise dergestalt sein, dass das Dichtelement an einer Unterseite und/oder an einer Oberseite eine konische Formgebung und/oder eine gestufte Formgebung aufweist, die zu einem sich nach außen aufweitenden Querschnitt führt. Auch ist eine Gestaltung möglich, bei der der Außenteil einen torusförmigen Abschnitt oder einen überwiegenden Teil des torusförmigen Abschnitts aufweist, während der Innenbereich einen mit dem torusförmigen Abschnitt verbundenen Haltering aufweist, dessen Dicke geringer als die Dicke des torusförmigen Abschnitts ist. Der Haltering ist dabei für die Dichtwirkung nachrangig. Seine Funktion besteht insbesondere darin, die Handhabung des Dichtelements während der Montage zu vereinfachen, indem er an einer inneren Ringfläche des Crimpdeckels reibschlüssig anliegt, wenn der Crimpdeckel mit dem Hüllenkörper verbunden wird.The shape of such a sealing element according to the first design option mentioned can, for example, be such that the sealing element has a conical shape and/or a stepped shape on an underside and/or on an upper side, which leads to a cross section that widens outward. A design is also possible in which the outer part has a toroidal section or a predominant part of the toroidal section, while the inner area has a retaining ring connected to the toroidal section, the thickness of which is less than the thickness of the toroidal section. The retaining ring is subordinate to the sealing effect. Its function consists in particular in simplifying the handling of the sealing element during assembly by frictionally engaging an inner annular surface of the crimp cover when the crimp cover is connected to the casing body.
Der Außenabschnitt weist vorzugsweise einen Außendurchmesser auf, mittels dessen er ebenfalls reibschlüssig an einer nach innen weisenden Ringfläche des Crimpdeckels reibschlüssig anliegt.The outer section preferably has an outer diameter, by means of which it also rests frictionally on an inwardly pointing ring surface of the crimp cover.
Bei der zweiten Gestaltungsmöglichkeit ist vorgesehen, dass der Außenteil eine höhere mittlere Dichte und/oder ein höheres mittleres E-Modul als der Innenteil aufweist. Dadurch zeigt der Innenteil eine höhere Neigung zur Komprimierung und kann somit leichter durch den Flüssigkeitsdruck ausgelenkt oder komprimiert werden, so dass in Folge dessen die genannten Dichtlinien bzw. Dichtflächen sich wiederum vorrangig im Außenbereich des Aufnahmeraums einstellen.In the second design option, it is provided that the outer part has a higher average density and/or a higher average modulus of elasticity than the inner part. As a result, the inner part has a greater tendency to compress and can therefore be deflected or compressed more easily by the liquid pressure, so that the sealing lines or sealing surfaces mentioned are in turn primarily set in the outer area of the receiving space.
Die Variationen hinsichtlich der Dichte bzw. des E-Moduls können bei einheitlichem Material durch den jeweiligen Aufbau bewirkt werden. So kann beispielsweise eine partiell schaumartige Struktur des Innenteils dort die Dichte bzw. das E-Modul verringern.The variations with regard to the density or the modulus of elasticity can be caused by the respective structure in the case of a uniform material. For example, a partially foam-like structure of the inner part can reduce the density or the modulus of elasticity there.
Besonders vorteilhaft ist es jedoch, wenn das Dichtelement aus mindestens zwei Materialen hergestellt ist, wobei ein den Innenbereich überwiegend bildendes Material vorzugsweise ein geringeres E-Modul und/oder eine geringere Dichte als das den Außenbereich überwiegend bildende Material aufweist. Zur Herstellung eines solchen Dichtelements aus mindestens zwei Materialen findet vorzugsweise Mehrkomponentenspritzguss Anwendung, so dass die beiden Materialien stoffschlüssig miteinander verbunden sind.However, it is particularly advantageous if the sealing element is made of at least two materials, with a material predominantly forming the interior preferably having a lower modulus of elasticity and/or a lower density than the material predominantly forming the exterior. Multi-component injection molding is preferably used to produce such a sealing element from at least two materials, so that the two materials are bonded to one another.
Die dritte Gestaltungsmöglichkeit sieht vor, dass am Dichtelement zungenartige Halteabschnitte vorgesehen sind, die nach innen weisen und die somit zumindest überwiegend dem Innenteil des Dichtelements zuzurechnen sind. Vorzugsweise sind zwischen drei und acht solcher nach innen weisender Halteabschnitte vorgesehen. Diese Halteabschnitte können dem Zweck dienen, zum Zwecke der vereinfachten Montage reibschlüssig an der genannten inneren Ringfläche anzuliegen.The third design option provides for tongue-like holding sections to be provided on the sealing element, which hold sections point inwards and which are therefore at least predominantly attributable to the inner part of the sealing element. Preferably, between three and eight such inwardly facing retaining portions are provided. These holding sections can serve the purpose of frictionally engaging the said inner annular surface for the purpose of simplified assembly.
Da die Halteabschnitte umlaufend durch die Freibereiche unterbrochen sind, kann der im Druckspeicher herrschende Druck im Bereich der Haltebereiche nach außen gelangen und wirkt dann in der gewünschten Weise primär auf den Außenteil, der sich vorzugsweise im Außenbereich des Aufnahmeraums befindet.Since the holding sections are interrupted all around by the free areas, the pressure prevailing in the pressure accumulator can escape to the outside in the area of the holding areas and then acts in the desired manner primarily on the outer part, which is preferably located in the outer area of the receiving space.
Die Montage eines erfindungsgemäßen Druckspeichers erfolgt erfindungsgemäß wie folgt: Ausgehend von einem Hüllenkörper, an dessen oberen Ende eine Öffnung vorgesehen ist, die von einem Crimpwulst umgeben ist, einem Crimpdeckel, der im Bereich eines Crimprandes eine in Richtung des Crimpwulstes offene umlaufende Crimpnut aufweist, und einem Dichtelement der beschriebenen Art wird das Dichtelementzunächst in die Crimpnut eingefügt. Dies erfolgt vorzugsweise derart, dass das Dichtelement an einer außenseitigen oder einer innenseitigen Fläche der Crimpnut reibschlüssig gehalten wird. Insbesondere kann das Dichtelementjedoch auch so auf die Crimpnut abgestimmt sein, dass es mit seinem Außenteil kraftschlüssig an der nach innen weisenden Fläche der Crimpnut hält und mit seinem Innenteil, insbesondere den oben beschriebenen Halteabschnitten, reibschlüssig an der nach außen weisenden Fläche der Crimpnut hält.The assembly of a pressure accumulator according to the invention is carried out according to the invention as follows: Starting from a sleeve body, at the upper end of which there is an opening which is surrounded by a crimping bead, a crimping cover which has a circumferential crimping groove open in the direction of the crimping bead in the area of a crimping edge, and a sealing element of the type described, the sealing element is first inserted into the crimping groove. This is preferably done in such a way that the sealing element is frictionally held on an outside or an inside surface of the crimping groove. In particular, however, the sealing element can also be matched to the crimping groove in such a way that its outer part is held in a non-positive manner on the inward-facing surface of the crimping groove and its inner part, in particular the holding sections described above, is held in a friction-locked manner on the outward-facing surface of the crimping groove.
Der Crimpdeckel mitsamt dem darin gehaltenen Dichtelement wird dann auf den Crimpwulst des Hüllenkörpers aufgesetzt. Hierbei gelangt das Dichtelement in Kontakt mit dem Crimpwulst und wird zwischen Crimpwulst und Crimpnut zusammengedrückt. Anschließend erfolgt der Crimpvorgang durch Verformung des Crimpdeckels, wobei dies in oben bereits geschilderter Weise innenseitig durch eine nach außen gerichtete Aufweitung oder außenseitig durch eine nach innen gerichtete einschnürende Verformung erfolgen kann.The crimp cover, together with the sealing element held therein, is then placed on the crimp bead of the casing body. The sealing element comes into contact with the crimping bead and is compressed between the crimping bead and the crimping groove. The crimping process then takes place by deforming the crimp cover, which can be done on the inside by an outwardly directed widening or on the outside by an inwardly directed constricting deformation in the manner already described above.
Die Erfindung betrifft weiterhin auch ein Verfahren zur Herstellungeines Dichtelements, nämlich des oben beschriebenen Dichtelements, bei dem vorgesehen ist, dass zungenartige nach innen weisende Halteabschnitte vorgesehen sind. Zur Herstellung solcher Dichtelemente wird ein Verfahren vorgeschlagen, bei dem zunächst ein Schlauchkörper aus einem elastischen Material hergestellt wird. Dieser Schlauchkörper verfügt an einer Innenseite über in einer Längsrichtung erstreckte Haltestränge, im Bereich derer ein Innendurchmesser des Schlauchkörpers geringer ist als im Bereich von zwischen den Haltesträngen vorgesehenen Nuten. Vorzugsweise sind zwischen drei und acht solcher Haltestränge und dementsprechend ebenso viele Nuten vorgesehen. Der Schlauchkörper wird dann anschließend quer zu seiner Längsrichtung geschnitten. Hierbei entstehen voneinander getrennte Scheiben. Diese bilden die Dichtelemente oder werden mittels weiterer Verarbeitungsschritte zu Dichtelementen weiterverarbeitet. Das beschriebene Verfahren ist kostengünstig und insbesondere für die Massenfertigung gut geeignet.The invention also relates to a method for producing a sealing element, namely the sealing element described above, in which it is provided that tongue-like holding sections pointing inwards are provided. To produce such sealing elements, a method is proposed in which a hose body is first produced from an elastic material. On an inner side, this hose body has holding strands extending in a longitudinal direction, in the area of which an inner diameter of the hose body is smaller than in the area of grooves provided between the holding strands. Between three and eight such holding strands and, accordingly, just as many grooves are preferably provided. The tubular body is then subsequently cut transversely to its longitudinal direction. This creates separate disks. These form the sealing elements or are further processed into sealing elements by means of further processing steps. The method described is inexpensive and particularly well suited for mass production.
Weitere Vorteile und Aspekte der Erfindung ergeben sich aus den Ansprüchen und aus der nachfolgenden Beschreibung von bevorzugten Ausführungsbeispielen der Erfindung, die nachfolgend anhand der Figuren erläutert sind.
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Fig. 1A und 1B zeigen einen erfindungsgemäßen Flüssigkeitsspender mit einem erfindungsgemäßen Druckspeicher in einer Gesamtansicht bzw. die Einzelkomponenten vor der Montage. -
Fig. 2A bis 2C zeigen in geschnittener Darstellung den Montagevorgang bei einem Druckspeicher gemäß Stand der Technik. -
Fig. 3A bis 3C zeigen in geschnittener Darstellung die Herstellung einer ersten erfindungsgemäßen Gestaltung der dichtenden Verbindung zwischen dem Hüllenkörper und dem Crimpdeckel des Druckspeichers. -
Fig. 4A bis 4D zeigen Details der dichtenden Crimpverbindung zwischen dem Hüllenkörper und dem Crimpdeckel des Druckspeichers gemäßFig. 3C . -
Fig. 5A bis 5C zeigen in geschnittener Darstellung die Herstellung einer zweiten erfindungsgemäßen Gestaltung der dichtenden Verbindung zwischen dem Hüllenkörper und dem Crimpdeckel des Druckspeichers. -
Fig. 6A und 6B zeigen Details derdichtenden Crimpverbindungzwischen dem Hüllenkörperund dem Crimpdeckel des Druckspeichers gemäßFig. 5C . -
Fig. 7 bis 16 zeigen verschiedene Gestaltungen erfindungsgemäßer Dichtelemente. -
Fig. 17 verdeutlicht eine Herstellungsmethode zur Herstellung eines Dichtelements gemäßFig. 7 .
-
Figures 1A and 1B show a liquid dispenser according to the invention with a pressure accumulator according to the invention in an overall view and the individual components before assembly. -
Figures 2A to 2C show a sectional view of the assembly process for a pressure accumulator according to the prior art. -
Figures 3A to 3C show a sectional representation of the production of a first design according to the invention of the sealing connection between the casing body and the crimp cover of the pressure accumulator. -
Figures 4A to 4D 12 show details of the sealing crimp connection between the shell body and the crimp cover of the accumulator according to FIGFigure 3C . -
Figures 5A to 5C show a sectional representation of the production of a second embodiment of the sealing connection according to the invention between the casing body and the crimp cover of the pressure accumulator. -
Figures 6A and 6B Fig. 12 shows details of the sealing crimp connection between the shell body and the crimp cover of the accumulator according to FigFigure 5C . -
Figures 7 to 16 show different configurations of sealing elements according to the invention. -
17 illustrates a manufacturing method for manufacturing a sealing element according to FIG7 .
Die
Zum Zwecke des Verschließens dieser Auslassöffnung ist ein metallischer Crimpdeckel 30 vorgesehen, der über einen Crimprand 32 verfügt, welcher bestimmungsgemäß mit dem Crimpwulst 24 des Hüllenkörpers 20 vercrimpt wird. Zwischen dem Crimpwulst 24 und dem Crimprand 32 wird dabei ein Dichtelement 50 eingefügt, welches den Innenraum des Druckspeichers 10 gegenüber einer Umgebung isoliert und welches zu diesem Zwecke in der Lage sein muss, trotz des im Druckspeicher 10 herrschendes Druckes die Abdichtung zu gewährleisten.For the purpose of closing this outlet opening, a metallic crimping
Der Flüssigkeitsspender 100 weist neben dem Druckspeicher 10 auch einen Austragkopf 90 auf, der beim vorliegenden Beispiel sehr einfach ausgebildet ist und lediglich einen Betätigungsdrücker 90 umfasst, der auf einen Ventilstutzen 37 einer Ventileinrichtung 38 aufgesetzt ist, so dass durch Niederdrücken des Betätigungsdrückers 90 die Ventileinrichtung 38 geöffnet wird und Flüssigkeit durch die Austragöffnung 92 hindurch ausströmen kann.In addition to the
Die
Diese Position des Dichtelements ist nachteilig. Bei hohem Überdruck im Druckspeicher 10 kann es passieren, dass der Druck das Dichtelement 50 weiter nach außen drückt, so dass es stellenweise den Anlagekontakt zum Crimpwulst 24 oder dem Crimprand 32 verliert. Die Dichtigkeit des Druckspeichers 10 ist dann nicht mehr gegeben.This position of the sealing element is disadvantageous. If there is a high excess pressure in the
Die
Anhand der
Die
Die Grenzlinie 4 ist durch einen mittleren Durchmesser 2 definiert, der durch den Mittelwert des minimalen Innendurchmessers 1 und des maximalen Außendurchmessers 3 gebildet wird.The boundary line 4 is defined by a mean diameter 2 formed by the mean value of the minimum inside diameter 1 and the maximum outside diameter 3 .
Wie in
Bei der Gestaltung gemäß der
Auch in Hinblick auf die Gestaltung der
Die
Die Dichtelemente 50 der
Bei der Gestaltung gemäß der
Bei den Gestaltungen der
Bei den Gestaltungen der
Bei den Gestaltungen der
Die
Claims (15)
b. es sind zwischen drei und acht Halteabschnitte (52A) vorgesehen.Annular sealing element (50) according to claim 6 with the following feature:
b. between three and eight holding sections (52A) are provided.
c. der Druckspeicher (100) ist nach einem der Ansprüche 1 bis 5 ausgebildet.Liquid dispenser (100) having the following characteristics:
c. the pressure accumulator (100) is designed according to one of Claims 1 to 5.
bereitgestellt, und
provided, and
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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EP21171886.1A EP4086190A1 (en) | 2021-05-03 | 2021-05-03 | Pressurized container , sealing element therefor and method of manufacturing the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP21171886.1A EP4086190A1 (en) | 2021-05-03 | 2021-05-03 | Pressurized container , sealing element therefor and method of manufacturing the same |
Publications (1)
Publication Number | Publication Date |
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EP4086190A1 true EP4086190A1 (en) | 2022-11-09 |
Family
ID=75787015
Family Applications (1)
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EP21171886.1A Withdrawn EP4086190A1 (en) | 2021-05-03 | 2021-05-03 | Pressurized container , sealing element therefor and method of manufacturing the same |
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Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413859A1 (en) * | 1974-03-22 | 1975-10-02 | Ver Deutsche Metallwerke Ag | SEAMLESS CONTAINER |
DE3918891A1 (en) * | 1989-03-04 | 1990-09-13 | Festo Kg | Sealing ring with stop member - has extra protruding damage to sealing body |
DE9014710U1 (en) * | 1990-10-24 | 1991-01-03 | Buderus Heiztechnik Gmbh, 6330 Wetzlar, De | |
EP0922888A2 (en) * | 1997-12-10 | 1999-06-16 | Festo AG & Co | Sealing ring |
JP2003300569A (en) * | 2002-04-11 | 2003-10-21 | Kanebo Ltd | Packing for multi-structure aerosol container, multi- structure aerosol container, and manufacturing method for the same |
JP2009057110A (en) * | 2007-08-06 | 2009-03-19 | Takeuchi Press Ind Co Ltd | Double aerosol container |
JP4422315B2 (en) * | 2000-09-27 | 2010-02-24 | 株式会社ダイゾー | Double aerosol container |
DE102018209944A1 (en) * | 2018-06-20 | 2019-12-24 | Contitech Vibration Control Gmbh | Injection molding process for the production of a ring element |
CN111316023A (en) * | 2017-11-15 | 2020-06-19 | Nok株式会社 | Sealing ring |
-
2021
- 2021-05-03 EP EP21171886.1A patent/EP4086190A1/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413859A1 (en) * | 1974-03-22 | 1975-10-02 | Ver Deutsche Metallwerke Ag | SEAMLESS CONTAINER |
DE3918891A1 (en) * | 1989-03-04 | 1990-09-13 | Festo Kg | Sealing ring with stop member - has extra protruding damage to sealing body |
DE9014710U1 (en) * | 1990-10-24 | 1991-01-03 | Buderus Heiztechnik Gmbh, 6330 Wetzlar, De | |
EP0922888A2 (en) * | 1997-12-10 | 1999-06-16 | Festo AG & Co | Sealing ring |
JP4422315B2 (en) * | 2000-09-27 | 2010-02-24 | 株式会社ダイゾー | Double aerosol container |
JP2003300569A (en) * | 2002-04-11 | 2003-10-21 | Kanebo Ltd | Packing for multi-structure aerosol container, multi- structure aerosol container, and manufacturing method for the same |
JP2009057110A (en) * | 2007-08-06 | 2009-03-19 | Takeuchi Press Ind Co Ltd | Double aerosol container |
CN111316023A (en) * | 2017-11-15 | 2020-06-19 | Nok株式会社 | Sealing ring |
DE102018209944A1 (en) * | 2018-06-20 | 2019-12-24 | Contitech Vibration Control Gmbh | Injection molding process for the production of a ring element |
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